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## org.junit.experimental.theories
Class Theories

    java.lang.Object
      org.junit.runner.Runner
          org.junit.runners.ParentRunner<FrameworkMethod>
              org.junit.runners.BlockJUnit4ClassRunner
                  org.junit.experimental.theories.Theories

All Implemented Interfaces:
  Describable, Filterable, Sortable

    public class Theories

extends BlockJUnit4ClassRunner

Nested Class Summary
`static class` | `Theories.TheoryAnchor`

Constructor Summary
`Theories(Class<?> klass)`

Method Summary
`protected void` | `collectInitializationErrors(List<Throwable> errors)` Adds to `errors` a throwable for each problem noted with the test class (available from `ParentRunner.getTestClass()`).
`protected List<FrameworkMethod>` | `computeTestMethods()` Returns the methods that run tests.
`Statement` | `methodBlock(FrameworkMethod method)` Returns a Statement that, when executed, either returns normally if `method` passes, or throws an exception if `method` fails.
`protected void` | `validateConstructor(List<Throwable> errors)` Adds to `errors` if the test class has more than one constructor, or if the constructor takes parameters.
`protected void` | `validateTestMethods(List<Throwable> errors)` Adds to `errors` for each method annotated with `@Test`that is not a public, void instance method with no arguments.

Methods inherited from class org.junit.runners.BlockJUnit4ClassRunner
`createTest, describeChild, getChildren, methodInvoker, possiblyExpectingExceptions, runChild, testName, validateInstanceMethods, validateOnlyOneConstructor, validateZeroArgConstructor, withAfters, withBefores, withPotentialTimeout`

Methods inherited from class org.junit.runners.ParentRunner
`childrenInvoker, classBlock, filter, getDescription, getName, getTestClass, run, setScheduler, sort, validatePublicVoidNoArgMethods, withAfterClasses, withBeforeClasses`

Methods inherited from class org.junit.runner.Runner
`testCount`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Theories

    public Theories(Class<?> klass)
             throws InitializationError

Throws:
  `InitializationError`

Method Detail

### collectInitializationErrors

    protected void collectInitializationErrors(List<Throwable> errors)

  Description copied from class: `ParentRunner`
  Adds to `errors` a throwable for each problem noted with the test class (available from `ParentRunner.getTestClass()`). Default implementation adds an error for each method annotated with `@BeforeClass` or `@AfterClass` that is not `public static void` with no arguments.

  Overrides:
    `collectInitializationErrors` in class `BlockJUnit4ClassRunner`

### validateConstructor

    protected void validateConstructor(List<Throwable> errors)

  Description copied from class: `BlockJUnit4ClassRunner`
  Adds to `errors` if the test class has more than one constructor, or if the constructor takes parameters. Override if a subclass requires different validation rules.

  Overrides:
    `validateConstructor` in class `BlockJUnit4ClassRunner`

### validateTestMethods

    protected void validateTestMethods(List<Throwable> errors)

  Description copied from class: `BlockJUnit4ClassRunner`
  Adds to `errors` for each method annotated with `@Test`that is not a public, void instance method with no arguments.

  Overrides:
    `validateTestMethods` in class `BlockJUnit4ClassRunner`

### computeTestMethods

    protected List<FrameworkMethod> computeTestMethods()

  Description copied from class: `BlockJUnit4ClassRunner`
  Returns the methods that run tests. Default implementation returns all methods annotated with `@Test` on this class and superclasses that are not overridden.

  Overrides:
    `computeTestMethods` in class `BlockJUnit4ClassRunner`

### methodBlock

    public Statement methodBlock(FrameworkMethod method)

  Description copied from class: `BlockJUnit4ClassRunner`
  Returns a Statement that, when executed, either returns normally if `method` passes, or throws an exception if `method` fails. Here is an outline of the default implementation:
  - Invoke `method` on the result of `createTest()`, and throw any exceptions thrown by either operation.
  - HOWEVER, if `method`'s `@Test` annotation has the `expecting` attribute, return normally only if the previous step threw an exception of the correct type, and throw an exception otherwise.
  - HOWEVER, if `method`'s `@Test` annotation has the `timeout` attribute, throw an exception if the previous step takes more than the specified number of milliseconds.
  - ALWAYS allow `@Rule` fields to modify the execution of the above steps. A `Rule` may prevent all execution of the above steps, or add additional behavior before and after, or modify thrown exceptions. For more information, see `MethodRule`
  - ALWAYS run all non-overridden `@Before` methods on this class and superclasses before any of the previous steps; if any throws an Exception, stop execution and pass the exception on.
  - ALWAYS run all non-overridden `@After` methods on this class and superclasses after any of the previous steps; all After methods are always executed: exceptions thrown by previous steps are combined, if necessary, with exceptions from After methods into a `MultipleFailureException`.
  This can be overridden in subclasses, either by overriding this method, or the implementations creating each sub-statement.

  Overrides:
    `methodBlock` in class `BlockJUnit4ClassRunner`

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